Jimmy Carter Is Trying a Brand-New Drug to Fight His Cancer

Former President Jimmy Carter says he has melanoma that has spread to his liver and brain — but he's fighting it with a drug so promising that its approval was fast-tracked last year.

Carter, 90, has already had his first infusion of the drug, known as Keytruda. It harnesses the immune system to fight melanoma that has spread through the body. Carter also told reporters he would undergo targeted radiation to his brain on Thursday afternoon.